1999 Ford Windstar seats problems

While stopped at red light, our ford windstar was rear-ended by a ford focus estimated to be going 50-60MPH. Both of us in the front seats suffered severe calf muscle injuries. We believe these were caused by the manual seat adjustment bar that runs the full width of the seat. We were both wearing seatbelts. An additional note: the driver's seatback broke on impact. Is there any history of leg trauma caused by seat hardware in rear-end collisions?

After purchasing van, not even one month later all lights started to turn on engine, ABS now n and its a rear light on gauge panel also we are in the middle of trying to get decent price for the freeze plug which also needs to be replaced because there is a leak of coolant from the bottom of van. Other wise its ok to drive. One I thing I didn't mention is the seat its struck it wont move back or forward with the electrical button.